在Spring 3 MVC + JSP Web应用程序中从列表中单独管理对象

Question

After thinking a lot, this is the best question title I could find. Not that representative, I'm sorry :-(.

By the way let me explain the problem. I have to implement an administration panel. It displays a table where every line contains a user with his roles and account status. You can see the idea sketched in the following image

now, my problem is about managing the backing model object:

1. I have to pass a list of users to populate the administration panel but
2. I have to bind each user to a model object and
3. I have to submit each user separately.

I found many tips for managing the table as a whole so that a single button submits all the users at the same time, but what I want to do is populating the table with a list and managing every list record (the user) separately .

I thought to manage each line with javascript to keep trace of the modified values and to use them to build a uri like http://authority/app/user_management/{user_id}/{is_locked}/{is_admin}/.../ . The uri will be triggered by the corresponding submit button, but I prefer to avoid this approach.

Moreover, to populate the table with the correct checkbox value it is necessary to have a binding enstablished. Any advice? Thanks!

Answer 1

I think you can use separate form for each row with a User object as a Model. You will have simple 'updateUser' handler with User object in input parameters list. As I remember it could be a User you are iterating through in your foreach, but I need to check it with the real example..) At least you can use simple form and pass 'id', 'isLocked', etc. as request parameters.

<!-- Inside foreach loop -->
<form action="/updateUser" method="POST">
<input type="hidden" name="id" value="${user.id}"/>
<tr>
    <td><input type="checkbox" name="isAdmin" value="Is Admin" checked="${user.isAdmin}"/></td>
    <td><input type="submit" value="Submit"/></td>
</tr>
</form>

And something similar on server side:

@RequestMapping(value = "/updateUser", method = RequestMethod.POST)
@ResponseBody
public ResponseDTO updateUser(@RequestParam String id, @RequstParam boolean isAdmin) {
// your update logic
}